Codeblock Syntax Highlighting

[Chrisae9]

Add syntax highlighting to code blocks, similar to how the GitHub Markdown renders.

Current Behaviour

if num > 1:
    # check for factors
    for i in range(2, num):
        if (num % i) == 0:
            flag = True
            break

Expected Behaviour

if num > 1:
    # check for factors
    for i in range(2, num):
        if (num % i) == 0:
            flag = True
            break

[dsmanohar]

Hello, i think we can use highlight.js for this and allowing a dropdown to select a language for Code block would be good

i am new to open source i would like to contribute to this.